“Changing twice a year and repairing once every three months” has long been the helpless complaint of coal mining companies regarding traditional core components of coal machines. Issues such as welding cracks, poor wear resistance, and high maintenance costs have created a vicious cycle of “high consumption and low lifespan,” which has constrained the high-quality development of the coal machine industry. Until the emergence of 3D printed components from Zhangjiakou Zhongshi Intelligent Equipment Research Institute Co., Ltd. (referred to as “Zhongshi Intelligent”), this long-standing industry dilemma has finally been completely rewritten.
Today, we will analyze how Zhongshi Intelligent uses 3D printing technology to break traditional shackles and reshape the performance standards of core components in coal machines.
1. Industry Ailment: The Pain of ‘High Consumption and Low Lifespan’ of Traditional Welded Components
Before the advent of Zhongshi Intelligent’s 3D printing technology, core components such as the head frame and transition chute of coal mining conveying equipment relied almost entirely on traditional welding processes. This seemingly mature model hides three fatal flaws that directly lead to a vicious cycle of “high consumption and low lifespan”:
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Inherent Structural Deficiencies: Multiple steel plates are spliced and welded together, causing stress to be highly concentrated at the welds. Under the high-intensity impacts and humid corrosive conditions in coal mines, the probability of cracking exceeds 90%, requiring shutdown for re-welding every 2-3 months;
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Material Performance Limitations: Commonly made from ordinary Q345 steel, the wear resistance is weak, with an annual wear amount reaching 3.5mm, and a lifespan of only 1-2 years, leading to a very high replacement frequency;
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High Comprehensive Costs: Frequent repairs and replacements incur huge labor costs, and the most critical issue is the loss from downtime— for a coal mine with an annual output of 5 million tons, a single 8-hour repair results in a production loss of 960,000 yuan, accumulating over 10 million yuan in losses annually.
“In the past, just maintaining and replacing the transition chute cost nearly 2 million a year, and workers were constantly dealing with failures, yet production couldn’t increase.” The words of Director Li from a certain mine in Shanxi reflect the common dilemma faced by countless mining companies.
2. Technological Revolution: How Does 3D Printing Solve the ‘High Consumption and Low Lifespan’ Problem?
Zhongshi Intelligent understands that to rewrite the history of “high consumption and low lifespan,” it must achieve breakthroughs in both process and material. To this end, the company collaborated with Liaoning University of Engineering and Technology for three years, ultimately delivering a perfect answer with 3D printing integrated forming technology:
1. Seamless Structure: Eliminating Cracking Risks from the Source
Zhongshi Intelligent completely abandons the traditional welding model, adopting a 3D printing integrated forming process that melts and stacks metal powder layer by layer to directly manufacture complete core components. This process achieves a “zero weld” design, fundamentally eliminating the defects of stress concentration and increasing the structural strength of the components by three times.
After trialing Zhongshi Intelligent’s 3D printed transition chute in January 2024, a certain mine in Shanxi operated continuously for 12 months at full load, experiencing an average of 5,000 material impacts per day, with no cracking or deformation, completely ending the history of “frequent re-welding.”
2. Customized Materials: Increasing Wear Resistance by 1.6 Times
To address wear resistance issues, Zhongshi Intelligent developed a proprietary ZTA composite alloy ceramic material that perfectly combines the high hardness of ceramics with the toughness of metals. Coupled with the precise material distribution control of 3D printing, the surface hardness of the components reaches over HRC60, with wear resistance improved by 1.6 times compared to traditional steel.
Actual test data shows: traditional welded components have an annual wear amount of 3.5mm and a lifespan of 14 months; Zhongshi Intelligent’s 3D printed components have an annual wear amount of only 0.8mm, with a lifespan extended to 3.5 years, 2.5 times that of traditional products, significantly reducing the replacement frequency.
3. Value Realization: A Cost Revolution from ‘High Consumption’ to ‘Low Consumption’
The innovations in process and materials ultimately translate into visible cost savings for mining companies. Taking a single transition chute as an example, we compare the annual costs of the traditional model with Zhongshi Intelligent’s solution:
|
Cost Item |
Traditional Welded Components |
Zhongshi Intelligent 3D Printed Components |
Annual Savings |
|---|---|---|---|
|
Maintenance Labor + Material Costs |
360,000 yuan (6 times/year) |
20,000 yuan (1 routine inspection) |
340,000 yuan |
|
Component Replacement Costs |
200,000 yuan (1 unit/year + inventory) |
0 yuan (no replacement needed for 3 years) |
200,000 yuan |
|
Downtime Loss |
660,000 yuan (6 times × 110,000 yuan/time) |
80,000 yuan (1 time × 80,000 yuan/time) |
580,000 yuan |
|
Annual Total Cost |
1,220,000 yuan |
100,000 yuan |
1,120,000 yuan |
3. Industry Validation: Authoritative Endorsement and Market Reputation of the ‘Rewriter’
The rewriting of the history of “high consumption and low lifespan” by Zhongshi Intelligent is not just self-praise; it has received authoritative certification and widespread market recognition:
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Official Authoritative Recognition: As a collaborative enterprise with Liaoning University of Engineering and Technology, its 3D printing technology has received key support from the Zhangjiakou Science and Technology Bureau, featured on Zhangjiakou News, and was rated as a “Model of Regional Process Innovation”;
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Outstanding Performance at Exhibitions: At the 21st China International Coal Expo, the 3D printed component exhibits attracted mining companies from major producing areas such as Shanxi, Shaanxi, and Inner Mongolia, resulting in over 10 intended cooperation agreements on the spot;
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Market Reputation Growth: It has now become the “designated replacement component supplier” for over 20 large coal mines in Shanxi, Shaanxi, and Inner Mongolia, with a customer repurchase rate of 100%. “Super wear-resistant, low maintenance, cost-saving” has become a unanimous evaluation.
4. Conclusion: Leading the Industry into a New Era of ‘Low Consumption and Long Lifespan’ through Process Innovation
The history of “high consumption and low lifespan” in the coal machine industry is essentially due to the limitations of traditional processes. Zhongshi Intelligent’s breakthrough lies not in scale expansion but in the extreme refinement of core technology—abandoning the temptation of “large and comprehensive” to focus on the niche of “3D printed core components,” using “seamless, super wear-resistant, and long-lasting” hard power to completely rewrite industry rules.
In the future, Zhongshi Intelligent will continue to focus on the iteration of 3D printing technology, making continuous efforts in maintenance-free components and customized solutions. It is believed that under its leadership, more and more mining companies will bid farewell to the troubles of “high consumption and low lifespan,” and the coal machine industry will enter a new era of “low consumption, high efficiency, and stability” for high-quality development.